Temperature compensation method for denoising fiber-optic gyroscope on basis of time series analysis

Abstract

A temperature compensation method for denoising a fiber-optic gyroscope on the basis of time series analysis comprises four steps of: step 1, designing an experimental scheme, performing fixed point low and high temperature testing experiment on the fiber-optic gyroscope, and utilizing acquisition software for data acquisition; step 2, performing time series analysis on the zero offset data of the gyroscope, and establishing the mathematical model of the random error of the fiber-optic gyroscope; step 3, adopting a kalman filtering algorithm to filter random noise in the zero offset data of the fiber-optic gyroscope; and step 4, utilizing the data which is de-noised by the kalman filtering to identify the model structure of the temperature shift error of the fiber-optic gyroscope, and calculating the parameters of the identified model. The method establishes the multinomial model of the static temperature shift error of the fiber-optic gyroscope through time series analysis, kalman filtering denoising treatment and identification of the temperature shift error model structure and parameters. The method completely meets the real-time compensation requirement on the project, and has a better practicable value and a wide application prospect in the technical field of aerospace navigation.

Description

(1) Technical field [0001] The present invention relates to a fiber optic gyroscope temperature compensation method based on time series analysis and denoising, which elaborates the method of time series analysis to eliminate noise and temperature compensation. This relationship can be accurately identified, an accurate model can be established, and the effectiveness of temperature compensation can be improved. This technology belongs to the field of aviation and aerospace navigation technology. (2) Background technology [0002] As a new type of inertial angular velocity sensor that is developing extremely rapidly, fiber optic gyroscope has its unique technical and performance advantages, such as all-solid-state structure, high reliability, long life; fast start-up speed, short response time; large measurement range and wide dynamic range ; Anti-shock, vibration, chemical corrosion resistance; small size, light weight, low cost; suitable for mass production, etc., have bee...

AI Technical Summary

Problems solved by technology

The performance of the optical components in the fiber optic gyroscope changes with temperature, and the non-linear change of the internal temperature field of the gyroscope caused by the different heating of the components in the circuit part will affect the thermal balance state of the gyroscope and directly cause the zero offset drift of the fiber optic gyroscope.

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